William Parr

• William Parr , English courtier and soldier
• William Parr, 1st Baron Parr of Horton, English courtier
• William Parr, 1st Marquess of Northampton, English courtier, brother of Catherine Parr
• William Parr, Australian explorer
• William Parr , English footballer
• William Parr, British convict transported to New South Wales in 1813